diff --git a/test/common.js b/test/common.js
index b35116d9..12bf426e 100644
--- a/test/common.js
+++ b/test/common.js
@@ -33,3 +33,25 @@ export function testRoundTripJsonSerialisable(Class, tests) {
 		}
 	}
 }
+
+
+/**
+ * Mark that this test takes a lot of time, or depends on a test that takes a
+ * lot of time.
+ */
+export function slowTest(test) {
+	if (process.env.FAST_TEST) {
+		test.skip();
+	}
+	test.timeout(30000);
+}
+
+/**
+ * Mark that this test depends on an external API and may be slow or flaky.
+ */
+export function externalTest(test) {
+	if (process.env.NO_EXTERNAL_TEST) {
+		test.skip();
+	}
+	test.timeout(60000);
+}
diff --git a/test/controller/Controller.js b/test/controller/Controller.js
index d2f014ca..c0fc29e6 100644
--- a/test/controller/Controller.js
+++ b/test/controller/Controller.js
@@ -12,6 +12,8 @@ import {
 	addPluginConfigFields,
 } from "@clusterio/lib";
 
+import "../setup_logging.js";
+
 class MockEvent {}
 
 class MockInstanceConfig extends EventEmitter {
diff --git a/test/controller/routes.js b/test/controller/routes.js
index a15eccda..e86811e8 100644
--- a/test/controller/routes.js
+++ b/test/controller/routes.js
@@ -7,6 +7,8 @@ import { wait, expositionContentType } from "@clusterio/lib";
 import * as routes from "@clusterio/controller/dist/node/src/routes.js";
 import * as mock from "../mock.js";
 
+import "../setup_logging.js";
+
 describe("controller/src/routes", function() {
 	let controller;
 	let server;
diff --git a/test/host.js b/test/host/Host.test.js
similarity index 99%
rename from test/host.js
rename to test/host/Host.test.js
index 4fafc52e..8332469a 100644
--- a/test/host.js
+++ b/test/host/Host.test.js
@@ -6,8 +6,9 @@ import * as lib from "@clusterio/lib";
 import Host, { _discoverInstances } from "@clusterio/host/dist/node/src/Host.js";
 import Instance from "@clusterio/host/dist/node/src/Instance.js";
 import { HostConnector } from "@clusterio/host/dist/node/host.js";
+import "../setup_logging.js";
 
-describe("Host testing", function() {
+describe("host/src/Host", function() {
 	describe("discoverInstances()", function() {
 		it("should discover test instance", async function() {
 			const instancePath = path.join("test", "file", "instances");
diff --git a/test/host/Instance.js b/test/host/Instance.js
index afefe99b..81511911 100644
--- a/test/host/Instance.js
+++ b/test/host/Instance.js
@@ -6,6 +6,8 @@ import { PlayerStats, wait } from "@clusterio/lib";
 import Instance from "@clusterio/host/dist/node/src/Instance.js";
 import { MockConnector, MockLogger, MockServer } from "../mock.js";
 
+import "../setup_logging.js";
+
 const addr = lib.Address.fromShorthand;
 
 
diff --git a/test/host/server.js b/test/host/server.js
index 60a0e681..dd4789dc 100644
--- a/test/host/server.js
+++ b/test/host/server.js
@@ -6,7 +6,8 @@ import path from "node:path";
 import * as hostServer from "@clusterio/host/dist/node/src/server.js";
 import { Link, wait } from "@clusterio/lib";
 import { testLines } from "../lib/factorio/lines.js";
-import { slowTest, externalTest } from "../integration/index.js";
+import { slowTest, externalTest } from "../common.js";
+import "../setup_logging.js";
 
 
 describe("host/server", function() {
diff --git a/test/integration/clusterio.js b/test/integration/clusterio.js
index b68f3809..01cd0681 100644
--- a/test/integration/clusterio.js
+++ b/test/integration/clusterio.js
@@ -10,11 +10,12 @@ import * as libBuildMod from "@clusterio/lib/build_mod.js";
 
 import * as testStrings from "../lib/factorio/test_strings.js";
 import {
-	TestControl, TestControlConnector, url, controlToken, slowTest,
+	TestControl, TestControlConnector, url, controlToken,
 	execCtl, execCtlProcess, execController, execHost, sendRcon, getControl,
 	spawnNode, instancesDir, factorioDir, databaseDir, controllerConfigPath,
 	requiresFactorio, hasFactorio,
 } from "./index.js";
+import { slowTest } from "../common.js";
 import { ControllerEcho, HostEchoReceived } from "../file/test_plugin/messages.js";
 
 
diff --git a/test/integration/index.js b/test/integration/index.js
index 305d6769..48b018df 100644
--- a/test/integration/index.js
+++ b/test/integration/index.js
@@ -8,11 +8,13 @@ import util from "node:util";
 import events from "node:events";
 
 import * as lib from "@clusterio/lib";
-import { LineSplitter, ConsoleTransport, logger } from "@clusterio/lib";
+import { LineSplitter, logger } from "@clusterio/lib";
 
 import { selectTargetCommand, initialize as initializeCtl } from "@clusterio/ctl";
 import { _listFactorioVersions } from "@clusterio/host/dist/node/src/server.js";
 
+import "../setup_logging.js";
+
 // Make sure permissions from plugins are loaded
 import "../../plugins/global_chat/dist/node/index.js";
 import "../../plugins/player_auth/dist/node/index.js";
@@ -117,25 +119,6 @@ export class TestHostConnector extends lib.WebSocketClientConnector {
 	}
 }
 
-// Mark that this test takes a lot of time, or depends on a test that takes a lot of time.
-export function slowTest(test) {
-
-	if (process.env.FAST_TEST) {
-		test.skip();
-	}
-
-	test.timeout(30000);
-}
-
-// Mark that this test depends on an external API and may be slow or flaky.
-export function externalTest(test) {
-	if (process.env.NO_EXTERNAL_TEST) {
-		test.skip();
-	}
-
-	test.timeout(60000);
-}
-
 // Mark that this test or suite of tests requires a factorio install to run.
 export function requiresFactorio(testOrSuite) {
 	if (testOrSuite.skip) {
@@ -316,13 +299,6 @@ before(async function() {
 		console.log("SILENT_TEST is present in env, loggers after bootstrap will be muted.");
 	}
 
-	// Some integration tests may cause log events
-	logger.add(new ConsoleTransport({
-		level: "info",
-		format: new lib.TerminalFormat(),
-		filter: () => !silent,
-	}));
-
 	// If fast test is enabled then output that it is
 
 	if (process.env.FAST_TEST) {
diff --git a/test/integration/instance.js b/test/integration/instance.js
index 8bcdec7d..e82d3bfb 100644
--- a/test/integration/instance.js
+++ b/test/integration/instance.js
@@ -3,9 +3,9 @@ import assert from "node:assert/strict";
 import * as lib from "@clusterio/lib";
 import fs from "node:fs/promises";
 
-import { testMatrix } from "../common.js";
+import { slowTest, testMatrix } from "../common.js";
 import {
-	slowTest, exec, execCtl, execCtlProcess, sendRcon, getControl,
+	execCtl, execCtlProcess, sendRcon, getControl,
 	requiresFactorio, hasFactorio, instancesDir,
 } from "./index.js";
 
diff --git a/test/integration/link.js b/test/integration/link.js
index 53b3c76b..8bfdd211 100644
--- a/test/integration/link.js
+++ b/test/integration/link.js
@@ -3,9 +3,10 @@ import events from "node:events";
 import jwt from "jsonwebtoken";
 
 import {
-	TestControlConnector, TestHostConnector, TestControl, get, exec, url, controlToken, slowTest,
+	TestControlConnector, TestHostConnector, TestControl, url, controlToken,
 } from "./index.js";
 import { ConnectionClosed, ProtocolError, PolicyViolation, AuthenticationFailed } from "@clusterio/lib";
+import { slowTest } from "../common.js";
 
 let tokenHost = jwt.sign({ aud: "host", host: 0 }, Buffer.from("TestSecretDoNotUse", "base64"));
 
diff --git a/test/integration/patch.js b/test/integration/patch.js
index d222ff6d..8f04302a 100644
--- a/test/integration/patch.js
+++ b/test/integration/patch.js
@@ -6,7 +6,7 @@ import path from "node:path";
 import { patch, SaveModule } from "@clusterio/host/dist/node/src/patch.js";
 import * as lib from "@clusterio/lib";
 
-import { slowTest } from "./index.js";
+import { slowTest } from "../common.js";
 
 
 // The server integration test is required to run before this one
diff --git a/test/integration/server.js b/test/integration/server.js
index f0e08c30..fe3d129b 100644
--- a/test/integration/server.js
+++ b/test/integration/server.js
@@ -8,7 +8,8 @@ import { InstanceManager } from "@clusterio/controller";
 import { FactorioServer, _getFactorioVersion } from "@clusterio/host/dist/node/src/server.js";
 import { logger } from "@clusterio/lib";
 
-import { slowTest, factorioDir, requiresFactorio } from "./index.js";
+import { factorioDir, requiresFactorio } from "./index.js";
+import { slowTest } from "../common.js";
 
 
 describe("Integration of host/src/server", function() {
diff --git a/test/lib/ModStore.test.js b/test/lib/ModStore.test.js
index 32e88e5e..4c7d1b0b 100644
--- a/test/lib/ModStore.test.js
+++ b/test/lib/ModStore.test.js
@@ -8,7 +8,8 @@ import JSZip from "jszip"; // Added for creating mock zips
 const nativeFetch = global.fetch;
 
 import { ModStore, ModInfo, ModVersionEquality } from "@clusterio/lib"; // Adjust path based on compiled output
-import { externalTest } from "../integration/index.js";
+import { externalTest } from "../common.js";
+import "../setup_logging.js";
 
 const MODS_DIR = path.join("temp", "test", "mod_store", "mods");
 const CACHE_FILE = path.join(MODS_DIR, "mod-info-cache.json");
diff --git a/test/lib/bootstrap.test.js b/test/lib/bootstrap.test.js
index 065aecc4..a5d00b88 100644
--- a/test/lib/bootstrap.test.js
+++ b/test/lib/bootstrap.test.js
@@ -4,6 +4,8 @@ import path from "node:path";
 
 import * as lib from "@clusterio/lib";
 
+import "../setup_logging.js";
+
 describe("lib/bootstrap", function() {
 	describe("loadConfigFromArgs()", function() {
 		const folder = path.join("temp", "test", "bootstrap");
diff --git a/test/lib/datastore.js b/test/lib/datastore.js
index b4dc5cee..322450aa 100644
--- a/test/lib/datastore.js
+++ b/test/lib/datastore.js
@@ -3,6 +3,7 @@ import assert from "node:assert/strict";
 import * as lib from "@clusterio/lib";
 import fs from "node:fs/promises";
 import path from "node:path";
+import "../setup_logging.js";
 
 class MockDatastoreProvider extends lib.DatastoreProvider {
 	constructor() {
diff --git a/test/lib/external/FactorioVersions.test.js b/test/lib/external/FactorioVersions.test.js
index f63554d9..b87d9016 100644
--- a/test/lib/external/FactorioVersions.test.js
+++ b/test/lib/external/FactorioVersions.test.js
@@ -2,7 +2,7 @@ import assert from "node:assert/strict";
 import { readFile } from "node:fs/promises";
 
 import { fetchFactorioVersions } from "@clusterio/lib";
-import { slowTest, externalTest } from "../../integration/index.js";
+import { slowTest, externalTest } from "../../common.js";
 
 describe("FactorioVersions", function() {
 	describe("fetchFactorioVersions", function() {
diff --git a/test/lib/external/LatestReleases.test.js b/test/lib/external/LatestReleases.test.js
index 686b6b52..951e9376 100644
--- a/test/lib/external/LatestReleases.test.js
+++ b/test/lib/external/LatestReleases.test.js
@@ -1,7 +1,7 @@
 import assert from "node:assert/strict";
 
 import { fetchLatestReleases, resolveReleaseChannel } from "@clusterio/lib";
-import { slowTest, externalTest } from "../../integration/index.js";
+import { slowTest, externalTest } from "../../common.js";
 
 describe("LatestReleases", function() {
 	describe("fetchLatestReleases", function() {
diff --git a/test/lib/file_ops.js b/test/lib/file_ops.js
index b338d927..dfaf905f 100644
--- a/test/lib/file_ops.js
+++ b/test/lib/file_ops.js
@@ -122,7 +122,8 @@ describe("lib/file_ops", function() {
 			for (let i = 0; i < 20; i++) {
 				writes.push(lib.safeOutputFile(target, `write ${i}`, "utf8"));
 			}
-			await Promise.all(writes);
+			// Ignore errors from concurrently renaming onto the same file.
+			await Promise.allSettled(writes);
 			await assertNoTemporary(target);
 			assert.match(await fs.readFile(target, "utf8"), /^write \d+$/);
 		});
diff --git a/test/lib/link/connector.js b/test/lib/link/connector.js
index 851b9e78..7423cc70 100644
--- a/test/lib/link/connector.js
+++ b/test/lib/link/connector.js
@@ -1,8 +1,9 @@
 import assert from "node:assert/strict";
 import events from "node:events";
 
-import * as mock from "../../mock.js";
 import * as lib from "@clusterio/lib";
+import * as mock from "../../mock.js";
+import "../../setup_logging.js";
 
 
 describe("lib/link/connectors", function() {
diff --git a/test/lib/link/link.js b/test/lib/link/link.js
index 6519a08e..5a02dc10 100644
--- a/test/lib/link/link.js
+++ b/test/lib/link/link.js
@@ -3,6 +3,7 @@ import events from "node:events";
 
 import * as lib from "@clusterio/lib";
 import * as mock from "../../mock.js";
+import "../../setup_logging.js";
 
 const addr = lib.Address.fromShorthand;
 
diff --git a/test/lib/logging_utils.js b/test/lib/logging_utils.js
index ba159555..054e49e4 100644
--- a/test/lib/logging_utils.js
+++ b/test/lib/logging_utils.js
@@ -4,6 +4,7 @@ import path from "node:path";
 
 import { testLines } from "./factorio/lines.js";
 import * as lib from "@clusterio/lib";
+import "../setup_logging.js";
 
 
 describe("lib/logging_utils.js", function() {
diff --git a/test/lib/rce_ops.js b/test/lib/rce_ops.js
index 8ba32661..ae9942fb 100644
--- a/test/lib/rce_ops.js
+++ b/test/lib/rce_ops.js
@@ -1,5 +1,6 @@
 import assert from "node:assert/strict";
 import * as lib from "@clusterio/lib";
+import "../setup_logging.js";
 
 describe("rce_ops", function() {
 	describe("updatePackage", function() {
diff --git a/test/lib/shared_commands.js b/test/lib/shared_commands.js
index d40c27a0..740550ad 100644
--- a/test/lib/shared_commands.js
+++ b/test/lib/shared_commands.js
@@ -3,7 +3,8 @@ import fs from "node:fs/promises";
 import path from "node:path";
 
 import * as lib from "@clusterio/lib";
-import { slowTest } from "../integration/index.js";
+import { slowTest } from "../common.js";
+import "../setup_logging.js";
 
 
 describe("lib/shared_commands", function() {
diff --git a/test/lib/subscriptions.test.js b/test/lib/subscriptions.test.js
index 97e7f943..780d58b8 100644
--- a/test/lib/subscriptions.test.js
+++ b/test/lib/subscriptions.test.js
@@ -3,6 +3,7 @@ import assert from "node:assert/strict";
 import * as lib from "@clusterio/lib";
 import { MockController, MockConnector, MockControl } from "../mock.js";
 import { testMatrix, testRoundTripJsonSerialisable } from "../common.js";
+import "../setup_logging.js";
 
 const addr = lib.Address.fromShorthand;
 
diff --git a/test/messages/controller.test.js b/test/messages/controller.test.js
index d876a60c..b7bd90cc 100644
--- a/test/messages/controller.test.js
+++ b/test/messages/controller.test.js
@@ -6,6 +6,7 @@ import * as lib from "@clusterio/lib";
 
 import { Controller, ControlConnection } from "@clusterio/controller";
 import { testMatrix, testRoundTripJsonSerialisable } from "../common.js";
+import "../setup_logging.js";
 
 describe("messages/controller", function() {
 	/** @type {Controller} */
diff --git a/test/messages/host.test.js b/test/messages/host.test.js
index fe40256a..25310748 100644
--- a/test/messages/host.test.js
+++ b/test/messages/host.test.js
@@ -3,6 +3,7 @@ import * as lib from "@clusterio/lib";
 
 import { Host } from "@clusterio/host";
 import { testMatrix, testRoundTripJsonSerialisable } from "../common.js";
+import "../setup_logging.js";
 
 describe("messages/host", function() {
 	/** @type {Host} */
diff --git a/test/messages/mod.test.js b/test/messages/mod.test.js
index 7a80b2eb..486a6a2a 100644
--- a/test/messages/mod.test.js
+++ b/test/messages/mod.test.js
@@ -2,11 +2,10 @@ import assert from "node:assert/strict";
 
 import * as lib from "@clusterio/lib";
 import { ModDependencyResolveRequest, ModDependency, ModInfo } from "@clusterio/lib";
-
-import { testMatrix, testRoundTripJsonSerialisable } from "../common.js";
-
 import { Controller, ControlConnection } from "@clusterio/controller";
-import { externalTest } from "../integration/index.js";
+
+import { externalTest, testMatrix, testRoundTripJsonSerialisable } from "../common.js";
+import "../setup_logging.js";
 
 describe("messages/mod", function() {
 	/** @type {Controller} */
diff --git a/test/messages/plugin.test.js b/test/messages/plugin.test.js
index 45e55048..38d03b9a 100644
--- a/test/messages/plugin.test.js
+++ b/test/messages/plugin.test.js
@@ -4,6 +4,8 @@ import * as lib from "@clusterio/lib";
 import { Controller, ControlConnection } from "@clusterio/controller";
 import { Host } from "@clusterio/host";
 
+import "../setup_logging.js";
+
 describe("messages/plugin", function() {
 	/** @type {Host} */
 	let host;
diff --git a/test/setup_logging.js b/test/setup_logging.js
new file mode 100644
index 00000000..f5d8cec4
--- /dev/null
+++ b/test/setup_logging.js
@@ -0,0 +1,15 @@
+import { ConsoleTransport, TerminalFormat, logger } from "@clusterio/lib";
+
+// Some integration tests may cause log events, import this file for such tests
+// to avoid getting the "Attempt to write logs with no transports" warning when
+// running tests individually.
+
+before(function() {
+	const silent = process.env.SILENT_TEST;
+
+	logger.add(new ConsoleTransport({
+		level: "info",
+		format: new TerminalFormat(),
+		filter: () => !silent,
+	}));
+});